Marine turtles are globally endangered species that spend more than 95% of their life cycle in in... more Marine turtles are globally endangered species that spend more than 95% of their life cycle in in-water habitats. Nevertheless, most of the conservation, recovery and research efforts have targeted the on-land habitats, due to their easier access, where adult females lay their eggs. Targeting the large knowledge gaps on the in-water critical habitats of turtles, particularly in the Large Marine Ecosystem Gulf of Mexico, is crucial for their conservation and recovery in the long term. We used satellite telemetry to track 85 nesting females from their beaches after they nested to identify their feeding and residency habitats, their migratory corridors and to describe the context for those areas. We delimited major migratory corridors in the southern Gulf of Mexico and West Caribbean and described physical features of internesting and feeding home ranges located mainly around the Yucatan Peninsula and Veracruz, Mexico. We also contributed by describing general aggregation and movement ...
Birth Defects Research Part A: Clinical and Molecular Teratology, 2015
Background: Congenital malformations in sea turtles have been considered sporadical. Research car... more Background: Congenital malformations in sea turtles have been considered sporadical. Research carried out in the Mexican Pacific revealed high levels of congenital malformations in the olive ridley, but little or no information is available for other species. We present results from analyses of external congenital malformations in olive ridley, green, and hawskbill sea turtles from Mexican rookeries on the Pacific coast and Gulf of Mexico. METHODS: We examined 150 green and hawksbill nests and 209 olive ridley nests during the 2010 and 2012 nesting seasons, respectively. Olive ridley eggs were transferred to a hatchery and incubated in styrofoam boxes. Nests from the other two species were left in situ. Number of eggs, live and dead hatchlings, and eggs with or without embryonic development were registered. Malformation frequency was evaluated with indices of prevalence and severity. Results: Mortality levels, prevalence and severity were higher in olive ridley than in hawksbill and green sea turtles. Sixty-three types of congenital malformations were observed in embryos, and dead or live hatchlings. Of these, 38 are new reports; 35 for wild sea turtles, three for vertebrates. Thirtyone types were found in hawksbill, 23 in green, and 59 in olive ridley. The head region showed a higher number of malformation types. Malformation levels in the olive ridley were higher than previously reported. Conclusion: Olive ridleys seem more prone to the occurrence of congenital malformations than the other two species. Whether the observed malformation levels are normal or represent a health problem cannot be currently ascertained without long-term assessments.
Evidence exists linking or- ganochlorines to adverse biologic effects, like mating disfunctions a... more Evidence exists linking or- ganochlorines to adverse biologic effects, like mating disfunctions and inmunosupression. The pesticide DDT is an organochlorine used in Mexico for combating malaria. In October 4th 2000, eight unviable green turtle and hawksbill turtle eggs were collected in El Cuyo and Celestún, Yucatán, México, respectively, and they were analyzed, using gas chromato- graphy, to detect quantifiable organochlorine
... an unobserved nest laid (Alvarado and Murphy, 1999; Broderick et al., 2003; Hernandez-Guzmán,... more ... an unobserved nest laid (Alvarado and Murphy, 1999; Broderick et al., 2003; Hernandez-Guzmán, 2003). ... of nests (nests) of hawksbill and green turtles throughout the nesting seasons studied ... In order to ascertain individual fecun-dity (F), hatching success (HS) and emergence ...
... Eduardo Cuevas1, María de los Ángeles Liceaga-Correa1, Mauricio Garduño-Andrade2 ... by Jord... more ... Eduardo Cuevas1, María de los Ángeles Liceaga-Correa1, Mauricio Garduño-Andrade2 ... by Jordan (1989) for the Yucatan Penin-sula, Goldberg (1973) for the Florida Penin-sula, Lasker and Coffroth (1983) for Belize and Márquez, Lozada and Rodríguez (1997) for ...
Conspicuous sedimentary deposits forming well-structured and prominent submarine dunes are found ... more Conspicuous sedimentary deposits forming well-structured and prominent submarine dunes are found on the coast of Yucatan (Mexico), close to the ports of Dzilam de Bravo, San Felipe, and El Cuyo. The objective of this study was to evaluate the morphological and sedimentological features of these submarine dunes. Sub-bottom seismologic profiles were obtained and standardized sedimentological analyses were performed on sediment samples collected at the three study sites. Both the height and wavelength of dunes were different between the three sites, mean heights ranging from 0.84 to 2.28 m and mean wavelengths from 98 to 330 m. Most of the dunes showed a well-marked asymmetry, which is related to the direction of their movements. Their granulometric composition was dominated by medium, moderately well-sorted sand. This study provides bases for future systematic monitoring of these peculiar ecosystems, including information to be considered for the evaluation of their ecological role in...
Marine turtles are globally endangered species that spend more than 95% of their life cycle in in... more Marine turtles are globally endangered species that spend more than 95% of their life cycle in in-water habitats. Nevertheless, most of the conservation, recovery and research efforts have targeted the on-land habitats, due to their easier access, where adult females lay their eggs. Targeting the large knowledge gaps on the in-water critical habitats of turtles, particularly in the Large Marine Ecosystem Gulf of Mexico, is crucial for their conservation and recovery in the long term. We used satellite telemetry to track 85 nesting females from their beaches after they nested to identify their feeding and residency habitats, their migratory corridors and to describe the context for those areas. We delimited major migratory corridors in the southern Gulf of Mexico and West Caribbean and described physical features of internesting and feeding home ranges located mainly around the Yucatan Peninsula and Veracruz, Mexico. We also contributed by describing general aggregation and movement ...
Birth Defects Research Part A: Clinical and Molecular Teratology, 2015
Background: Congenital malformations in sea turtles have been considered sporadical. Research car... more Background: Congenital malformations in sea turtles have been considered sporadical. Research carried out in the Mexican Pacific revealed high levels of congenital malformations in the olive ridley, but little or no information is available for other species. We present results from analyses of external congenital malformations in olive ridley, green, and hawskbill sea turtles from Mexican rookeries on the Pacific coast and Gulf of Mexico. METHODS: We examined 150 green and hawksbill nests and 209 olive ridley nests during the 2010 and 2012 nesting seasons, respectively. Olive ridley eggs were transferred to a hatchery and incubated in styrofoam boxes. Nests from the other two species were left in situ. Number of eggs, live and dead hatchlings, and eggs with or without embryonic development were registered. Malformation frequency was evaluated with indices of prevalence and severity. Results: Mortality levels, prevalence and severity were higher in olive ridley than in hawksbill and green sea turtles. Sixty-three types of congenital malformations were observed in embryos, and dead or live hatchlings. Of these, 38 are new reports; 35 for wild sea turtles, three for vertebrates. Thirtyone types were found in hawksbill, 23 in green, and 59 in olive ridley. The head region showed a higher number of malformation types. Malformation levels in the olive ridley were higher than previously reported. Conclusion: Olive ridleys seem more prone to the occurrence of congenital malformations than the other two species. Whether the observed malformation levels are normal or represent a health problem cannot be currently ascertained without long-term assessments.
Evidence exists linking or- ganochlorines to adverse biologic effects, like mating disfunctions a... more Evidence exists linking or- ganochlorines to adverse biologic effects, like mating disfunctions and inmunosupression. The pesticide DDT is an organochlorine used in Mexico for combating malaria. In October 4th 2000, eight unviable green turtle and hawksbill turtle eggs were collected in El Cuyo and Celestún, Yucatán, México, respectively, and they were analyzed, using gas chromato- graphy, to detect quantifiable organochlorine
... an unobserved nest laid (Alvarado and Murphy, 1999; Broderick et al., 2003; Hernandez-Guzmán,... more ... an unobserved nest laid (Alvarado and Murphy, 1999; Broderick et al., 2003; Hernandez-Guzmán, 2003). ... of nests (nests) of hawksbill and green turtles throughout the nesting seasons studied ... In order to ascertain individual fecun-dity (F), hatching success (HS) and emergence ...
... Eduardo Cuevas1, María de los Ángeles Liceaga-Correa1, Mauricio Garduño-Andrade2 ... by Jord... more ... Eduardo Cuevas1, María de los Ángeles Liceaga-Correa1, Mauricio Garduño-Andrade2 ... by Jordan (1989) for the Yucatan Penin-sula, Goldberg (1973) for the Florida Penin-sula, Lasker and Coffroth (1983) for Belize and Márquez, Lozada and Rodríguez (1997) for ...
Conspicuous sedimentary deposits forming well-structured and prominent submarine dunes are found ... more Conspicuous sedimentary deposits forming well-structured and prominent submarine dunes are found on the coast of Yucatan (Mexico), close to the ports of Dzilam de Bravo, San Felipe, and El Cuyo. The objective of this study was to evaluate the morphological and sedimentological features of these submarine dunes. Sub-bottom seismologic profiles were obtained and standardized sedimentological analyses were performed on sediment samples collected at the three study sites. Both the height and wavelength of dunes were different between the three sites, mean heights ranging from 0.84 to 2.28 m and mean wavelengths from 98 to 330 m. Most of the dunes showed a well-marked asymmetry, which is related to the direction of their movements. Their granulometric composition was dominated by medium, moderately well-sorted sand. This study provides bases for future systematic monitoring of these peculiar ecosystems, including information to be considered for the evaluation of their ecological role in...
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